He grew up literally being tortured for the sake of gaining a tolerance to it.

and poisoned.......

Yup, though I would count that as torture, since he was never intended to be killed by it. We know he's been whipped, shocked and poisoned, so much so that he's pretty much immune to poisons and electricity. That's a lot of torture.

Since she got an immortal body, no matter how mess up the state her body gotten into she won't die. Actually who would still being alive to experience the pain of when his own body got dissect into pieces for experimental purpose and then getting patch up again like a torn up cloth. And she had to go through all of that every single day until she has gotten the strength to trigger an earthquake strong enough to sink the entire Tokyo city underwater.

He was born from a dead body and shouldn't have been alive in the first place, then grew up in a mercenary camp where his adoptive father sold him out as a toy for other men, takes his money from his battles, and then tries to kill him. He defends himself and the entire camp turns on him and he is shot with arrows and attacked by wolves. Pretty bad.

He was born from a dead body and shouldn't have been alive in the first place, then grew up in a mercenary camp where his adoptive father sold him out as a toy for other men, takes his money from his battles, and then tries to kill him. He defends himself and the entire camp turns on him and he is shot with arrows and attacked by wolves. Pretty bad.

You hit the nail on the head, he easily had the worst childhood, it would take a life time of therapy to help him

Hmm not sure this was mentioned.
How bout Kiritsugu from Fate/Zero? His dad zombified the entire community including the girl he loved (who of course, tried to kill him) and then Kiritsugu shot his father to make sure it would never happen again. That sucks.

He was born from a dead body and shouldn't have been alive in the first place, then grew up in a mercenary camp where his adoptive father sold him out as a toy for other men, takes his money from his battles, and then tries to kill him. He defends himself and the entire camp turns on him and he is shot with arrows and attacked by wolves. Pretty bad.

You hit the nail on the head, he easily had the worst childhood, it would take a life time of therapy to help him

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Oh, yes, I forgot. And he had to kill the person who was his hero and father figure in order to protect himself.